Proportioning of self-compacting steel-fiber reinforced concrete mixes based on target plastic viscosity and compressive strength: Mix-design procedure &amp; experimental validation

Rosa, Ángel De La; Poveda, Elisa; Ruiz, Gonzalo; Cifuentes, Héctor

doi:10.1016/j.conbuildmat.2018.09.006

Cited by 30 publications

(33 citation statements)

References 20 publications

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“…Due to its straight configuration and smaller size, micro steel fiber can be more easily handled in SCC mixtures than macro steel fibers. An upper limit of 1.0% of steel fiber in SCC was advised to be used by previous studies [25,26]. Based on which and on several trial mixtures, it was found in this study that a steel fiber content of 1.0% is quite acceptable to achieve SCC mixtures without significantly influencing the required fresh properties.…”

Section: Experimental Workmentioning

confidence: 82%

“…In their work to introduce mixture design procedure for fiber-reinforced SCC, Khayat et al [25] concluded that a fiber volume fraction of 0.5% can be considered as the upper limit to produce SCC without significantly affecting its fresh properties. On the other hand, a recent study by de la Rosa et al [26] introduced a new mixture design procedure for steel fiber-reinforced SCC with fiber volume fractions up to 1.0%. They stated that beyond this fiber content, the practical producing of SCC with the desirable fresh properties that fall within the limits of modern SCC standards [27] becomes not easy.…”

Section: Introductionmentioning

confidence: 99%

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Repeated drop-weight impact tests on self-compacting concrete reinforced with micro-steel fiber

Abid

Abdul-Hussein

Ayoob

et al. 2020

Heliyon

104

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A B S T R A C TSteel fiber has become a proven material that can significantly alter the behavior of different types of concrete mixtures from brittle to more ductile ones. Rich literature is currently available on the mechanical properties of steel fiber-reinforced self-compacting concrete. However, the investigation of the impact resistance of this material to drop weight is still required to enrich the knowledge about its behavior under different loading conditions. An experimental work was conducted in this research to evaluate the performance of steel fiber-reinforced self-compacting concrete under repeated impact loading using the repeated blows test recommended by ACI 544-2R. The tests investigated the effect of drop weight and drop height in addition to fiber content. Straight microsteel fibers were incorporated in three volumetric contents of 0.5, 0.75 and 1.0% and were compared with a similar plain mixture. The test equipment was adjusted to conduct repeated impact loading from different dropheights and using different drop-weights. The adopted drop-heights were 450, 575 and 700 mm, while the adopted drop-weights were 4.5, 6.0 and 7.5 kg. The combination of the adopted drop-heights and weights composes four loading cases in addition to the standard loading case with a drop-weight and drop-height of 4.5 kg and 450 mm. The inclusion of micro steel fiber was found to significantly increase the impact resistance of selfcompacting concrete with percentage developments ranging from 150 to 860% compared to plain samples. The specimens tested under 4.5 kg and 450 mm drop weight and height exhibited the highest percentage improvement in impact resistance among the five loading cases. The results also showed that the impact ductility of fibrous specimens was up to 24% higher than that of plain specimens.

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Section: Experimental Workmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Repeated drop-weight impact tests on self-compacting concrete reinforced with micro-steel fiber

Abid

Abdul-Hussein

Ayoob

et al. 2020

Heliyon

104

View full text Add to dashboard Cite

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“…If these systems are considered homogenous suspensions, the Krieger–Dougherty equation [ 1 , 2 ] gives the dynamic viscosity from the volume fraction of cement particles, which may be obtained from the water/cementitious materials relationship,

[ 3 ]. The interest and application of the Krieger–Dougherty equation in these suspensions are due, from a theoretical point of view, to its robustness and the fact that its parameters have a physical significance [ 1 , 4 , 5 , 6 ]. The Krieger–Dougherty equation [ 1 , 2 , 6 ] is defined as follows:

where,…”

Section: Introductionmentioning

confidence: 99%

“…Much research has been performed on the rheology of the various types of cement suspensions in which the suitability of this equation for the calculation of dynamic viscosity has been verified [ 2 , 4 , 5 , 7 , 8 ]. In addition, a comparison has been made of the values calculated with the experimental measures performed with rheometers, thereby obtaining good results with cement pastes with and without superplasticizer admixtures [ 1 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Calculation of Dynamic Viscosity in Concentrated Cementitious Suspensions: Probabilistic Approximation and Bayesian Analysis

et al. 2021

Self Cite

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We present a new focus for the Krieger–Dougherty equation from a probabilistic point of view. This equation allows the calculation of dynamic viscosity in suspensions of various types, like cement paste and self-compacting mortar/concrete. The physical meaning of the parameters that intervene in the equation (maximum packing fraction of particles and intrinsic viscosity), together with the random nature associated with these systems, make the application of the Bayesian analysis desirable. This analysis permits the transformation of parametric-deterministic models into parametric-probabilistic models, which improves and enriches their results. The initial limitations of the Bayesian methods, due to their complexity, have been overcome by numerical methods (Markov Chain Monte Carlo and Gibbs Sampling) and the development of specific software (OpenBUGS). Here we use it to compute the probability density functions that intervene in the Krieger–Dougherty equation applied to the calculation of viscosity in several cement pastes, self-compacting mortars, and self-compacting concretes. The dynamic viscosity calculations made with the Bayesian distributions are significantly better than those made with the theoretical values.

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“…FRC is a competitive and useful construction material because fibers in the FRC resist crack propagation with the help of stress transfer from the matrix to the fiber and furthermore its fabrication process is flexible and simple. Since the first major investigation of steel fiber reinforced concrete (SFRC) was conducted in the early 1960s in order to improve its brittleness [5], numerous studies on the SFRC and its applications have been carried out [6][7][8][9]. Among various kinds of SFRCs developed to date, ultra-high-performance fiber-reinforced concrete (UHPFRC) exhibits excellent mechanical performance [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effects of Water Reducing Admixture on Rheological Properties, Fiber Distribution, and Mechanical Behavior of UHPFRC

2018

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The rheological properties of ultra-high-performance fiber-reinforced concrete (UHPFRC) according to the amount of water reducing admixture (WRA) and their effects on the fiber distribution and the tensile performance of UHPFRC were investigated. Four types of mixtures with a high compressive strength over 150 MPa were designed according to the amount of WRA and the flowability, rheological properties, compressive strength, flexural performance, and fiber distribution were measured. Test results showed that the amount of WRA influences both the freshly mixed and hardened properties. It was also revealed that the flexural strength has a strong correlation with rheological properties, compressive strength, and fiber distribution.

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Proportioning of self-compacting steel-fiber reinforced concrete mixes based on target plastic viscosity and compressive strength: Mix-design procedure & experimental validation

Cited by 30 publications

References 20 publications

Repeated drop-weight impact tests on self-compacting concrete reinforced with micro-steel fiber

Repeated drop-weight impact tests on self-compacting concrete reinforced with micro-steel fiber

Calculation of Dynamic Viscosity in Concentrated Cementitious Suspensions: Probabilistic Approximation and Bayesian Analysis

Effects of Water Reducing Admixture on Rheological Properties, Fiber Distribution, and Mechanical Behavior of UHPFRC

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